Priming device for internal-combustion engines



July 3,1923. 7 1,460,886

c. E. CHAPMAN PRIMING DEVICE FOR INTERNAL COMBUSTION ENGINES Filed July 8, 1922 vmwwnmr,

Patented July 3, 1923.

UNITED s'reras PATENT or-i=1(351,

CHARLES E. CHAPMAN, or roar EDWARD, N w YoRK, nssrenoa or oNE-H-ALE To JOSEPH GOOIDFELLOW, or roa'rnnwa-en, new YORK. A

air intake and mixing tube, wherein saidf 'PRIMING mevrcn roe INTERNAL-COMBUSTION ENGINES;

v Application filed J'u1yt8,

To all whom it may concern:

Be it known that I, CHAnLEs E. CHAPMAN, citizen of the United 'States, residing. at Fort, Edward, in the county of Washmgton and State of New York, have invented certain new and useful Improvementsin Priming Devices for Internal-Combustion Engines, of which the following is aspecification.

This invention relates to an improved priming device for internal combustion engines and seeks, as one of its principalobjects, to provide a device of this character whereby anengine may, in cold weather, be started quickly and easily.

The invention has as a further object to provide a device which will operateto'd'eliver a rich fuel mixture into the engine cylinders so that ignition may readily take place and wherein the injection of liquid fuel into the cylinders .will be avoided.

Another object of the invention is to pro vide a device embodying a throttle valvecontrolling the flow of fuel mixture to the engine cylinders and also embodying a fuel valve controlling feed of the liquid fuel and wherein means will be provided for operating said valves simultaneously so that when the throttle valve is opened, flow of liquid fuel will be permitted and vice versa.

A still further ob'ject of the invention is to provide a device embodying a combined tube will be closed by a mixing screen, and wherein the liquid fuel will, whenthe valves of the device are open, be permitted to drip onto said screen to bebroken up thereby and mixed with the inrushing air to form a rich fuel mixture. if

:The invention has as, a. furtherbbject to provide a device wherein the liquid'fuel will be fed thereto by gravity so that the troubles experienced in extremely cold weather in at,- tempting-to lift; the fuel by engine suction will be overcome.

And the invention has asja still further object to provide a devicewhich may be readily installed and which may beemployed in connection with motor vehicle engines 0E conventional make.

tion, and

1 922. SeiialNo. 573,641.

hereinafter. I

In, the drawings a t Figurel is afragmentary side elevation j Otherand incidental objects williappear showing my improved ,device in connection with} the engine of a motonvehicle, parts being broken away and shown in section.- FigureQ is an enlarged detail view of the device, partly in elevationand partly in sec- 1 Figure 3' is a direction vof thearrowsr I Referrin drawings my improved priming devicein connection with the engine of a conventional motor vehicle. :The engine is indicated at lO t and the intake manifold thereofn at 11;. Connow more particularly toflthe nected to said manifold is the usual carjL-sha-ped body bar 18 at the lower endof which is arranged a verticallyzdisposed throttle valve casing 19 upon which is mounteda throttle valve 20., Threaded into the valve casing at its upper endrislacombined' air inlet and mixing tube 21- pro.-

have, for convenience, yshown F transverse'sectional view on w M thelme 33 of Figure 2, lookingin'the viding a mixing chamber '22 andremovably fitting 'in the upperend of said tube is a sleeve523. having a flange 24:- overhanging the upper end edge of the tube. Thisysleeve 1. is removably secured inpositionby-a set screw 25 and mounted upon the sleeve-is a combined atomizing and closure screen 26. g Y

The screen is preferably frusto-conical in shape and is arranged in inverted position to depend within the sleeve, the screen being appropriately secured at its larger end to the wall of the; sleeve at the upper-end thereof. .As will be" app'arent,"the sleeve ma by'releasing' the set screw 25, be readily removed .so that the screen may be easily.

cleaned at any time and, in this connection,

attention is directed to the fact that the screen lies within the lines of the sleeve so that when the sleeve is so removed, the sleeve will house and protectthe screen. Threadedinto the valve casing l9 at its lower-tend is an elbow 2-7 having a pipe 28 extending therefrom which pipe, as shown in Figure 1,*leads intothe intake manifold ll'of the engine, and interposedin said pipe is a union 29 so that the pipe may be readily connected to the" manifold. 1

Mounted upon the body bar 18 at its upper end is a horizontally disposed fuel valve casing 3 0 mounting a fuel valve 31 project ing at the forward end of the casingand provided with an upturned arm 32. Mounted upon the vehicle dash" is an appropriate liquid fuel tank .33 arranged'above the level of" the fuel valve and extending from said tank is a supply pipe 34 connected to the rear end of the valve casing 30, a suitable shut-off valve 35 being. preferably interposed in'said pipe. Mounted upon the valve casing 30 atits lower side is a depending drip no zzle36 disposed axially oi? the air inlet a'nd'mixing tube 21. -At its upper end this nozzle is provided with an annular head threaded "through the wall of the-valvechamber of the valve casing while, as brought out [in Figure .3,tl1e noz zle is preferably square in cross section throughout its length below said head. Formed in the sidelfaces of the nozzle are drip slots 37 which extend longitudinally of the'nozzle from end to end thereof to open through the head at the upper. endof the nozzle, these slots being relatively narrow soas to permit a restricted flow of fuel therethrough. Upstanding' from the valve casing 30 is a lug 38 andlbolted or otherwise secured to said lug is a hanger strap 39 appropriately secured at its upper end to the brace rod 17 rigidly connecting; the de- V108 with said rod. v I

Extending rearwardly from the body bar 18 is, a horizontally directed arm 40 andpivoted at a point between its endsupon said arm is ale ver' 41. Extendingbetween -upper endof the lever and the arm of the fuel valve 31 is a link 41-2 and eXtend m between the lower end portion of the lever and the throttle valve 20 is a link 43.

Formed on oi" otherwise secured] to the bo'w'2Tis eye 44 andextendinp; between sald eye and the lower end portion of the lever 4i is a sprin -45 acting upon the lever for normally holding the valves 20 and 3,1

clo's'ed. However, in order toavoid failure tlrejcl'osing of the valve 31, due toloose ness' iii the pivotal connections between the lever {11 and said valve, I provide an auxilry springs nn ct d at we. n to h afndat itsioppo'siteend 32 of the valve, this spring acting to close the valve 31 individually so that the valve will, under normal circumstances, be tightly held in engagement with its seat so as to prevent leakage oi fuelpast the valve Pivotally connected'to the" lower- 'end'of the lever 41 is a link 47 which extends rearwardly from said lever and, as shown in Figure 1, is suitably attached-to" the prim ing rod 14'. v As will now be readily understood in view of the preceding description, when the priming rod ll is pulled rearwardly for chok ing the air' inlet of the carbureter 12, the rear end of the lever ll will be rocked rear.- wardly so that, as shown iii 'dotted lines in Figure 2 of the drawings, thev'alve 20"will be pulled rearwardly to open position while the valve 31 will be shifted forwardly to open position. Accordingly, liquid fuel will then be permittedto gravitate from the tank 33 into the valve casing .30 to Qdrip through the slots 37 from the nozzle 36 onto the atomizing screen 26. Coincident with the actuation of the priming rod 14:, the

engine starter is, of course, set in operation so that engine suction 1n the p pe 28 w ll cause the liquid fuelto be drawn through said screen along with a supply-of air. Thus, the liquid fuel, in being, drawn 4 through the screen, will be broken up not only by the screenbut also by the inrush ing air passing through the screen so that the" liquid fuelwill accordinglyibe e ough'ly atomized and mixed with the air in the mixing chamber 22. "As will be perceived, a rich fuelmi'xture will thus .be formed, which mixture will be, drawn from.

the mixing chamber through the throttle valve to the engine. cylinders (where, due to engine suctionis eliminated and fconse V quent failure underadverse weather condi tions overcome. Furthermore, it. to be noted that. when the priming'device is func tioning and the throttle valv 'go, is" open so that air'may freely flow through't'he mixing chambe r'intothe intakeinanifold of the engine, the engine suction to the carbureter of theengine will be reduced, with the result that air: taken in through the screen at the upper end of the mimngchain her will attain a proportionately higher velocity. Accordingly, air rushing into the mixing chamber at thislpointwill serve to effectually break up the liquid fuel falling upon the mixing screen." 1, I i

Having thus described the invention, what'is claimed aS new is:

1; A priming device for internal combustion engines including a' body bar, a fuel valve carried by said bar and provided with a depending drip nozzle, a throttle valve uponthe bar provided with ail-upstanding mixing tube having its upper end disposed to receive fuel dripping from said nozzle, an arm extending from the bar, a lever pivoted upon said arm, and links extending between the lever and said valves, thelever being operable for simultaneously opening or closing the valves. 7

2; In a priming device forinternal com: bustion engines, a fuel nozzle discharging fuel independent of engine suction, a fuel valve controlling flow of fuel through the nozzle, a mixing chamber open to the atmosphere and disposed to receive fuel issuing from said nozzle, a throttle valve associated with said chamber, and means for operating said valves.

3. In a primingdevice for internal combustion engines, a fuel nozzle discharging fuel independent of engine suction, a fuel valve controlling flow of fuel through the nozzle, a mixing chamber terminating at one end beneath the nozzle to receive fuel issuing from said nozzle and having said end thereof in unobstructed communication with the atmosphere, a throttle valve associated with said chamber, and means for operating said valves.

4. In a priming devicefor internal combustion engines, a fuel nozzle flowing fuel under the pressure head of a fuel supply, a fuel valve normally cutting off flow of fuel to the nozzle, a mixing chamber open to the atmosphere and disposed to receive fuel issuing from said nozzle, a throttle valve associated with said chamber, and means for operating said valves.

5. In a priming device for internal combustion engines, a fuel nozzle discharging fuel independent of engine suction and provided with a slot therein whereby fuel may" drip from the nozzle through said slot, a fuel valve controlling flow of fuel through the nozzle, a mixing chamber open to the atmosphere and disposed to receive fuel dripping from said nozzle, a throttle valve associated with said chamber, and means for operating said valves. 6. In a priming device for internal combustion engines, a fuel nozzle discharging fuel independent of engine suction, a'fuel valve controlling flow of fuel through the nozzle, amixing chamber open to the atmosphere and disposed to receive fuel issuing from said nozzle, a mixing screen in said chamber, a throttle valve associated with the chamber, and means for operating said.

valves. I

7. In a priming device for internal combustion engines, a fuel wnoz'zle "discharging fuel independent of engine suction, a fuel valve controlling flow of fuel through the 7 nozzle, a mixing chamber having one end'in unobstructed communication to the. atmosphere and having said end thereof disposed to receive .fuel issuing from said'nozzle, a

mixing screen disposed inqsaid end -of the chamber, and meansdetachably mounted upon thechamber supporting the screen.

'8. In a priming device for internal oo-mbustion engines,a fuel nozzle discharging. fuel independent of engine suction, a fuel-- valve controllingfiow of fuel through the nozzle, a mixing tube having one end thereof in unobstructed communication with theatmosphere and'disposed to receive fuel issu ing from said nozzle, a' sleeve removably mounted in said end of the tube, and amix- :1 9. In a priming device for internal combustion engines a fuel nozzle discharging" fuel independent of engine suct on, a mixing ing screen carried by said sleeve.

chamber disposed to receive fuel issuing from said nozzle, a fuel valvecontrolling flow of fuel through thenozzle, a throttle valve associated withi saidfchamber, and means for simultaneously opening or closing i said valves.

10. In a priming device for internal comfuel independent of engine suction, a mixing chamber disposed to receive fuel issuing a from, said nozzle, a fuel valve controlling flow of fuel through the nozzle, a throttle valve associated with said chamber, a 'piv oted lever, and meansconnectin'g the valves with said lever at opposite sides of the pivotal center thereof whereby the lever may be operated for opening or closing saidvalves simultaneously. 1

11. In a priming device for internal com bustion engines, a fuel nozzle flowing fuel under the pressure head of afuel supply, a mixing chamber having one end thereof in unobstructed communication with the 'atmos phere and disposed below the'nozzle to re ceive the fuel flowing therefrom, and a 1T1iX- ing screen mounted in said end of the chamber whereby fuelflowing from the nozzle will'strike the screen at the mouth of said chamber.

12. The bustion engine having an intake manifold and a carbureter connected with said manifold and having a choke valve, of a prim'er including a mixing chamber connecteolto the manifold, a .throttle valve associated with said chamber, a fuel nozzle flowing fuel into the mixing chamber under the pressure head of a fuel supply, afuel valve normally cutting. off flowo-ffuel to the'nozzle, and 9 operatively combination with an internal com I 95 bustion engines, a' fuel nozzle" discharging 13.v The combination with an internal c0mbustion engine having an intake manifold and a earloureter connected with said manifold, of a primer including a mixing chain her open to the atmosphere and connected to the manifold between the oarbureter and engine, a fuel nozzle discharging fuel into said chamber independent of engine suction, a

fuel-Valve controlling fiowoffuel through the nozzleianda throttle valve associated with said mixing chamber and controlling the intake of air through the mixing cha n-- her into the manifold reducing engine suction to the carbureter when said throttle valve is open. ,i 1

In testimony whereof I affix my signature,

CHARLES E. CHAPMAN. a 3. 

